电磁流量计在线校准的可靠性分析

Reliability Analysis of Online Calibration of Electromagnetic Flowmeter

通过对特定实验得到的数据进行建模分析,以不确定度的方式评价在线校准的可靠性。得到结果为U=0.62%(k=2),略大于电磁流量计本身的最大允许误差±0.5%,叠加后的示值误差的可靠性区间为(-1.12%~1.12%)。由此说明,在线校准的方式基本满足其常规使用时的±2%误差限要求,具备较强可靠性。

Through modeling and analyzing the data obtained from specific experiments,the reliability of online calibration is evaluated by uncertainty.The result is U=0.62%(k=2),which is slightly larger than the maximum allowable error of electromagnetic flowmeter itself±0.5%.The reliability range of indication error after superposition is(-1.12%-1.12%).Therefore,the on-line calibration method basically meets the requirement of±2%error limit in normal use,and has strong reliability.